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Question-1
A spherical ball rolls on a table without slipping. Then the fraction of its total energy associated with rotation is

(A) ²/₅	(B) 5/₇
(C) ³/₅	(D) ³/₇

Question-2 A couple produces _______.

(A) No motion	(B)Linear and rotational motion
(C)Purely rotational motion	(D)Purely linear motion

Question-3 A flywheel rotating about a fixed axis has a kinetic energy of 360J when its angular speed is 30 rad/s. The moment of inertia of the wheel about the axis of rotation is _______.

(A) 0.6 kgm²	(B)0.15 kgm²
(C)0.8 kgm²	(D)0.75 kgm²

Question-4 A solid sphere of radius R is placed on a smooth horizontal surface. A horizontal force F is applied at height h from the lowest point. For the maximum acceleration of the centre of mass

(A) h = R	(B)h = 2R
(C)h = 0	(D)The acceleration will be same whatever h may be

Question-5
Two bodies of mass 1 kg and 3 kg have position vectors respectively. The centre of mass of this system has a position vector

(A)	(B)
(C)	(D)

Question-6 The moment of inertia of a disc of mass M and radius R about a tangent to its rim in its plane is

(A) ²/₃ MR²	(B)³/₂ MR²
(C)⁴/₅ MR²	(D)⁵/₄ MR²

Question-7 A particle of mass m = 5 kg is moving with a uniform speed v = 3 √2 in the XOY plane along the line Y = X + 4. The magnitude of the angular momentum of the particle about the origin is

(A) 60 unit	(B)40 √2 unit
(C)Zero	(D)7.5 unit

Question-8 A ring of mass m and radius r rotates about an axis passing through its center and perpendicular to its plane with angular velocity on its kinetic energy is _______

(A) ¹/₂ mr² ω²	(B) mrω²
(C)mr²ω²	(D) ¹/₂ mrω²

Question-9 Angular momentum :

(A) Vector (axial )	(B)Vector ( polar )
(C)Scalar	(D)None of these

Question-10
O is the centre of an equilateral triangle ABC. F₁, F₂ and F₃ are three forces acting along the side AB, BC and AC as shown in figure. What should be the magnitude of F₃. So that the total torque about O is zero ?

(A) ^{( F₁ + F₂ )} /₂	(B) ( F₁ - F₂ )
(C) (F₁ + F₂ )	(D) 2 (F₁ + F₂ )

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Plus 1 Biology Science

CBSE

Practice in Related Chapters
Units and Measurements
Motion in a Straight Line
Laws of Motion
Mechanical Properties of Solids
Motion in a Plane
Waves
Gravitation
Thermodynamics
Thermal Properties of Matter
Work,Energy and Power
Kinetic Theory
System of Particles and Rotational Motion
Oscillations
Mechanical Properties of Fluids

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